Ok here is a list based on data.
Yahoo says:
22nd July 2008's most searched!
Check out "Google Trends" to view an up-to-date record of Google's most searched keywords.
Reading is the most searched hobby on the internet.
lycos
It is "google."
I searched their blogs through the keywords. Most of the time I used Google to search it.
sex
Michael jackson
ameteur sex sex boobs boobs pressing suck penis lick remove dress remove bra pussy sexy public sex large penis large boobs
homeworkanswershow to make stuff
Eminem/slim shady and Rhianna
Justin Bieber as of July 7, 2010.